Necticut



G. E. WHITNEY.

PRESS.

APPLICATION FILED DEC.4.1916- 1,317,1 15, PatentedSept. 23,1919.

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G. E. WHITNEY.

mss.

APPLICATION FILED DEC. 4.1916- 1 ,3 1 7, 1 1 5 Patented Sept. 23, 1919.

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G. E. WHITNEY.

PRESS.

APPLICATION FILED 050. 4. 19m.

Patented Sept. 23, 1919.

3 SHEETS-SHEET 3- muw "UNTTED STATES PATENT GFFICE.

GEORGE E. WHITNEY,-OF BRIDGEPORT, CONNECTICUT, ASSIGNOR T INTERNATIONALPAVEMENT COMPANY, OF HARTFORD, CONNECTICUT, A CCRPORATION 0F CON- NECTICUT.

PRESS.

To all whom it may concern Be it known that I, GEORGE E. WHITNEY, acitizen of the United States, and a resident of Bridgeport, in thecounty of Fairfield and State of Connecticut, have invented anImprovement in Presses, of which the following description, inconnection with the accompanying drawings, is a specifica tion, likecharacters on the drawings representing like parts.

This invention pertains to an improvement in presses and moreparticularly to improvements in molding press'es'of therotary mold type.One of the principal difiiculties attending the operation of saidpresses is to produce uniform intermittent partial .unidirectionalrotation of the revolving mold carrying table or head. The principalobstacles to be overcome are the intermittent engagement of the rotarymold table by the mold table operating means and to secure accuratestoppage of the mold table during its periods of rest, so that the moldtable may register accurately with the mold filling means, under whichthe plurality of molds carried by the mold table are usuallysuccessively brought in register.

It is among the objects of my invention to solve the difficulties abovereferred to and to this end I provide certain novel mechanisms which aretypified by one embodiment of a preferred construction of my invention,as shown in the drawings.

As the present invention relates more particularly, but not exclusively,to mold table operating mechanism, I have elected to disclose myinvention in connection with a type of press shown and described inPatent No. 1,174,212, issued March 7, 1916.

Referring to the drawings, which show one illustrative embodiment of apreferred construction of my invention,

Figure 1 is a side elevation thereof;

Fig. 2 is a plan view thereof;

Fig 3 is a sectional elevation thereof, taken, on the line 33 of Fig. 2;

F a is a section partially broken away on the line l'1 of Fig. 2; and

Fig. 5 shows a detail of the valve operating mechanism, which will behereinafter described.

Referring to Fig. 2, I have shown a bed plate carrying a pressure fluidcylinder 11 having a piston therein connected by a piston rod 12 to adisplacing plunger 13 Specification of Letters Patent. Patented Sept,23, 1919 Applicationfiled December 4, 1916. Serial No. 134,891.

adapted to displaoeliquid in a cylinder 14, thereby to impartcompressive movement to a ram 15 in the same general manner, as shownin'my earlierPatent No. 1,174 21.2.

Mounted on the bedplate :10, I preferably provide a single cycle timingshaft 20, which may be and preferably is drilvcnby a gearing 21-22 fromaadriving shaft 23, to which power may be imparted by a pulley 2% drivenfrom any suitable source of power.

The pressure system and power system, before described, form noxpart ofthe pres ent invention .and arenot herein illustrated nor described.

Rising from bed plate 19, I preferably provide a mold carrier supportingcolumn 30, on which is rotatably mounted the mold carrier 31 having aplurality of molds 32. Above the mold carrier 31 I preferably provide anabutment 33 carried by the columns 3-l35 provided with a pressure bl0ck36(Fig. 3) adaptedto close the top of that mold which is above the ram15. Each mold may be and preferably is provided with a mold plunger 37,each reciprocable in its mold and rotatable with said mold table 31.Above the mold:table 31, I preferably .provide a mold filling neckorconduit 38.

The before described instrumentalitie's may be and preferably are verysimilar to those shown in my patent previously-referred to. I will nowdescribe a preferred construction of the improved mold table operatingmeans, which constitutes one form of constantly engaged turret'movingmeans. I preferably provide a gear 40 concentric .with, and preferablyattached to, the rotatable mold table 31. Said gear 40 is preferablyconstantly engaged with a mold table driving pinion tl which is keyedtoa mold table driving shaft 42 adapted to receive intermittentlyeffective I rotary movement from pressure fluid actuatedinstrumentalities, more fully described hereafter. The mold tabledriving shaft 42 may extend through the pinion ll into a bearing 43carried by the abutment 33, and the lower end of said shaft 42 may beprovided with a bearing 44- on the bed plate 10 of the press. Keyed tothe shaft 42 preferably adjacent the bottom end thereof, I may andpreferably do provide aworm gear 45 adapted to be driven by a worm 46directly connected to the shaft 47 of a pressure fluid engine 48,

' the valve mechanism of which will be more fully described hereafter.Through the before described train. offgearin'g, the Vmold table 31 willbe rotated as and when the rotary movement is imparted to the crankshaft 47 of the engine 48-.

The moldrtable operating instrumentalities, before described, must beeffective to impart intermittent partial rotation to. the

pref

mold 'table 31, each partial rotation erably-being the exact distancebetween two i adjacentmolds'of the mold table 31. To this 1 .end I mayand preferably do make the gear table 31' an amount of movement exactlyequal to the distance between two adjacent molds of the mold table. 7 IV 7 While it is not essenti'l fo'rall' purposes 0f my invention that thegear 40bear the ratio to the pinion 41, above mentioned, it

is necessary that the amount of rotation- V imparted to the pinion 41 ateach cycle of operationof the press be exactly the same.

It is 7 also essential that' such movement the timed withrelation to theper ods :of operation of the compressing instrumentalities a andothercooperating instrument-alities of the press. To thls endlfprovldemeanson .the timing shaft 20 of the press typified by the cam 50, whichconstitutes one form of timing means for the mold table operating means.7

The, pressure fluid engine 48 is preferably 7 'multi-cylindered and maybe'as shown, provided with two cylinders 51-51 with" pistons 52-52,piston rods 53 53 and-connecting 'rods-54-454 engaging the cranks 47-47of the crank shaft 57. The cylinder 51 is provided with a slideival've156 having its exhaust cavity somewhat longer than is :operation'of theturret moving engine 48.

-'1 preferably" provide, however, means for stopping said engine whichis not depend- -ent onmovement of the timing shaft 20, but

the usual construction, such additionallength beingpro'vided so thatwhenthe: slide valve 5 6 is "inthe central position, both-ends of H thecylinder 51 'will be exhausted to the at;

' side lap The slide valve 55 of the cylinder 51 is'preferably withoutany substantial out of the usual proportions, so that both ends of thecylinder 51 cannotbe exhaustedwhen the valve is in central :position.:Each of the slide' valves 55 and 56 isprovided with an eccentric of theusual constructionon the crank shaft 57, so that when said slide valvesare reciprocated ,by said eccentric, the pressure fluid engine willimpart unidirectional clockwise'rotation to the turret 31. i

To provide for stopping and starting the turret; 1 preferably provide alink connection 60 between'the slide valve. 56 and its eccentric andlink connection 61-. between the slide valve 55 and its eccentric. The

extreme lower position. 7 7 58 -433 are connected to the shaft bycentric V V 1 Thus one revolution of. :the driving pinion 41 impartswtothe mold-- and the exhaust cavity is preferably through an interposedlinks 60 and 61 are pirovidedivith dead'rods thelatter being adapted tohold the former to hold the slide valve 5 5 in its The dead rodsconnections.

"Referring now I the. mechanism for shiftingthe links 60- 61 to startand stop the, pressure fluid engine. The movement of the valvecontrolling links -60-6'1' from theposition shown in Fig. 3 to theleftto start thejengine, isactuated by the timingcam 50 on the timing"-shaft 20 wl'ii'chrocks the lever 70, fulcrumed at 71 on the bedplate 10.Said lever is connected get its upper end by-v a rod 721W1tl1 a'lever73, fulcrun'ied ona rocker shaft 74 and conpnected atitslowerend'through the connection 75 to the valve controlling link 60. :Similarconnectionsv between the rocker shaft 74' and the link 61 provide forshift ing of the'latterlinkin unison with the shiftingof. the link- 60:When the links- 60'61 areshifted to the left from the posito Fig. 3, 1wiilfdescribe tion shown i1'1Fig.'3, the connectionibetween itheeccentrics and the" slide yalves immediately becomes operat ve toreciprocate the latter, thereby admitting steam to the cylindersto causeoperation of-the engine.

Conversely, when the links 60'61*are; e

shifted'to theright, the lengths of the dead rods are such thattheengine is stoppedor locked, because the slide valve 56 .is held incentral position, thereby exhaustin'gboth ends of the cylinder 5 1 whilethe-slide valve 55 is held in its downward position,

thereby I admitting full steamv pfressureto' thetopof the cylinder 51.;Thelinks 60-61 V v 77 onthelsha'ft 42,said cam 77 rocking the "lever78"which engages a an arm 79011 the rocker shaft 74.

are shifted to the right by meansvof a cam The-timing shaft 2-0 thusinitiates the which is controlledby an element actuated *by'the'turretmoving engine and to thisend flxhaveiprovided the-lever 76 on the shaft7 '7 4, said lever .76: thereby constituting-in effect an offsetextension of the lever 73, said by a cam '77 ontheturretmoving shaft 42links to the, right in position to stop-the engine." V F zThus thevalve'mechanism of the pressure fluid engine 48-is shifted to operativeposition' by means connected to the timing shaft 1 QOjand; is. shiftedtononoperative position v 1 by means-actuated by the'eng1ne=48,1 the Ilatterineans being in effect controlled by the amount of movement givento the meld table .on the resistance to rotation of the turret.

By the described independent .means for initiating thestartingmf-theengine 48 and for producing stoppage thereof,:the amount of time duringwhichtheienginemayrun at each movement of the turret may vary, but thenumber of revolutions which it will make during such period'will bevconstant, thereby insuring accurate positioning ofthe turret at eachstoppage :thereof. It will be noted that by:the foregoing arrangement Ihave provided turret moving means which constantly engagesathe turret,thereby eliminating thedifiiculties usually attending the alternateconnection anddisconnectionof a constantly moving turret operatingelement with the turret. The-engine .47 will always start when the valvecontrolling links 60 and 61 are shifted to valve operating .positionbecause the cranks are set .at 90 thereby eliminatingdeadcenter. Topermit sudden stoppage of the engine, I preferably omit the usual flywheel thereby rc ducing the inertia attending .the sudden stopping andstarting of :the engine. To permit rapid operation of the press, I mayprovide such a ratio of'gearing between the crank shaft 47 andthe turret3'1 as will permit rapid turning-of the turret 31 without increasingunduly the speed of operation of the pressure fluid engine 48.

lVhile I have shown in the'drawings and have described :one specificembodiment of a preferred construction of my invention,

it willbe understood vthilt my invention is not limited sto-tthe.embodiment shown and described, but that major changeszinvolvingomissions, substitutions,:alterations and rearrangement of'parts, may bemadewithout departing :from the scope of my invention, which is Fbestdefined by the following claims:

Claims.

1. A molding press comprising in combination an intermittently, step bystep rotatable pressure :fluid actuated mold table; and pressurefluidactuated operating. means constantly operatively connected to saidmold table during periods1of motion and rest of said 'mold table andtransmitting every movement ofsaid'operating means to said table.

'2. A molding'press comprising ineombination an intermittently, step bystep roti /table mold table; and pressure fluid actuated operating meansconstantly operatively connected to said mold table during periods ofmotion and rest of said mold table and transmitting'every movement ofsaid operatingmeans to said table.

3. In a molding press a combination of an intermittently,rstep by steprotatable mold table having a plurality of molds; a gear constantlyoperatively connected thereto, a pinion constantly meshing with saidgear; and pressure fluid actuated operating means for saidpinionconstantly operatively connected thereto and transmitting everymovement of.said"operating means to said table.

4.111 a molding press a combination of an intermittently, step by step,rotatable mold table having a plurality :of molds; a gear constantlyoperatively connected thereto; a driving means :constantly engaging saidgear; and pressure fluid actuated operating means for said driving meansconsta-ntly operatively connected thereto and transmitting everymovement ofsaid operating means to said table. i

5. In a molding press a combination of "an intermittently, step bysteprotatable moud table having a. plurality'of molds; a gear constantlyoperativelyconnected thereto; a pinionconstantly engaging said gear;pressure fiu'idope "ating means for said pinion constantlyoperativelyconnected thereto; and automatic timing means for said operating means.

6. In a molding press a combination of a rotatable mold table having a.plurality of molds; a gear-constantly operatively connected thereto; apinion constantly engaging said gear; operating means for said.p1n-

ion constantly operatively connected there to; timing means for saidoperating-means including a starting element actuatedby the timing shaftof said press and a stepping element actuated by said actuating means.

.7. A molding press comprising in combination a rotatable mold table;operating means therefor permanently, operatively 'connectedto' saidmold table; timing means 'for said operating means, includingmeansoperated by the timing shaft of said press for initiating'movement ofsaid operating means; and means actuatedby said operating means forstopping movement thereof.

8. A moldingpress comprising in combination a rotatable mold table;pressure fluid actuated operating means therefor permanently,operatively connected to said mold table; timing means for saidoperating means, including means operated by .the timing shaft of saidpress for initiating movement of said operating means; and meansactuated by said operating means for stopping movement thereof.

9. A molding press coi'nprising in combination a rotatable mold carrierhaving a plurality of molds; a pressure fluid engine for startsaid'engine movement of said mold table mine'd point.

tion and rest of said pressure'fluid engine and of said mold table. n vA a t 11. A molding press comprisingin combination a mold table; 'apressure fluid actuator therefor; gearing constantly connected to saidpressure fluid-actuator and to said mold table during both the periodsof movement and of'restiof-said mold table;and timing means for saidpressure fluid errgine,-including means for'shifting'a valveelement ofsaid engine into stopping position to stop said engine andautomaticmeans to shift said valve into starting position to 12. A moldingjpresscomprising in combination a mold table having aplurality of molds andintermittent mold table operatingv means including a pressure fluid.cylinder; its piston and valve means for admitting pressure fluid tosaid cylinder and retaining pressure fluid against one side of saidpiston to prevent momeiitumactuated at a predeter- 13. A press having anintermittently'step by step rotatable mold table; an actuator for saidmold table; and constantly, connected power transmitting meansoperatively interposed between said actuator, and sa1d mold table andtransmitting every. movement of saidactuator to'said mold table. 1

'14. A press having an intermittently rotatable mold table; a" yieldingactuator therefor; a positive constantly connected train of gearingintermedlate sald yreldlnjg 1 actuator and said table and'constantlyconnecting the two; and "timing means for timing the periods ofoperation of said yielding actuator relative to thecooperatinginstrumentalities of said press, w

' 15. A molding press comprising in combination a rotatable mold tableand pressure fluid means for actuating intermittent: par-i tialunidirectional rotation of said" mold table and for holding said moldtable stationary in a predetermined position, said-pres sure fluid meansstarting and stoppingfor every movement of said mold'table.

' 16. A molding press comprising in combination' rotatable mold table; anlilltl the engine after a said engine; and means for shifting saidvalve to stop said engine.

17. A molding press comprising in combination a rotatable moldtable; amulticylinder engine for efl'ectingrotation of said mold table; apressure fluid controlling valve for one cylinder of saidengine; meansfor operating said valve during operation of said engine; and; linkmeans for shifting said valve 'to stop said engine;

'18. A molding press comprising in combination a rotatable mold table; amulticylinder engine for effecting rotation of said mold table; apressure fluid controlling valve for one cylinder of said engine; meansfor operating said valve during operation of said engineanda linkconnection between said means for operating said valve and said valveproviding one position for oper- 'ating the engine and another positionfor locking said engine after a predetermined number of revolutionsi r19. A molding press comprising in combination a rotatable mold table anda pressure fluid engine for efl'ecting intermittent rotation of saidmold table; saidpressure fluid engine being provided With valvemechanism and link mechanism controlling said valve mechanism, includinga link having one end connected to an eccentricconnection and theotheri'end' connected to a centric connection. I 1 r 20; .A moldingpress comprising in combination a rotatable moldtable and'a pres surefluid engine for eflecting intermittent rotation of said mold table;saidpressure fluid engine being provided With valve mechanism and linkmechanism controlling said valve mechanism, including a link having oneend connected to an eccentric connection to opera-tethe engine and theother end connected to a centric connection'to stop theengine. 2135Amolding press comprising in combination a rotatable mold table and apressure fluid engine for effecting intermittent rotation of saidmold'table; said pressure fluid engine being provided With v-alvemechanism and link mechanism controlling nection to operate the engineand the other end connected to a centric-connection'to stoppredetermined number of revolutions thereof. 5

- 22. A molding press comprising, in combination, an intermittentlyrotatable mold table; pressure fluid actuating means for impartingstep-by-step rotation to" said table and. constantly connected thereto;and saw said valve mechanism, including a link havmg one end connectedto an eccentric conmatic timing means for starting and stop ping saidpressure fluid actuating means and to start and stop said table Amolding ress comprising, in combination, a rotata le mold table;pressure fluid means for effecting s'tep-by-step, intermittent,unidirectional rotation of said mold table and for opposingmomentum-actuated eXcess movement of said mold table.

24:. A molding press comprising, in comtuated by the timing shaft ofsaid press.

In testimony whereof, I have signed my name to this speclfication.

GEORGE E. WHITNEY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

' Washington, D. 0.

It is hereby certified that in Letters Patent No. 1,317,115, grantedSeptember 23, 1919, upon the application of George E. Whitney, ofBridgeport, )onneetieut,

appears in the printed specification for animprovernont in Prosses, anerror requiring correction as follows: Page 5, line 2, claim 22, [or theword and rend thereby; and that the said Letters Patent should be readwith this correction therein that the some may conform to the record ofthe case in the Patent Oflico.

Signed and sealed this 21st day of October, A. D., 1919.

[SEAL] M. II. COULSTON,

Acting Uomomt'sioner of Patents.

